If you have the latest version of Wordpress you need to activate it. On the top right there's a "Screen Options", select "Discussions"
I know but it's a tiny link at the bottom of my main page that leads to a yucky looking box. That's not an appropriate place for a link to a comment box. I need a box for my blog posts and happy customers page that looks professional and isn't a hassle to use. No one is going to leave a comment there besides a spammer. If I add a discussion thread and make it #1 on another page it still doesn't work. Nothing works. I've been goofing around since January trying different things and I give up Lol can someone tell me what to do that I wouldn't have already thought of myself? I tried plugins to move the box and that didn't work either. I am going insane. I updated it this morning and activated the discussion settings, etc. It still doesn't work.
Try going to your discussion settings and turn on commenting , if that doesn't work , re-install your blog.